# NPN and PNP output characteristics

#### pinkyponky

Joined Nov 28, 2019
351
Hello all,

I have been confusing the output characteristics of NPN and PNP. Please can any one draw the graphs and explain?.

#### BobTPH

Joined Jun 5, 2013
8,655
Show us what circuit you are talking about. There are many configurations that can be used with different output characteristics.

Bob

#### SamR

Joined Mar 19, 2019
5,019

#### pinkyponky

Joined Nov 28, 2019
351
Show us what circuit you are talking about. There are many configurations that can be used with different output characteristics.

Bob
I am talking about general output characteristics.

#### BobTPH

Joined Jun 5, 2013
8,655
There is not such thing. You need a circuit before you can talk about output.

Bob

#### LvW

Joined Jun 13, 2013
1,749
I am talking about general output characteristics.
Each output requires an input. There are - in principle - three different input-output characteristics. Which are you interested in?

#### Papabravo

Joined Feb 24, 2006
20,985
Transistors have three basic configurations and they each perform different functions. The configurations are:
1. Common Emitter
2. Common Base
3. Common Collector
Pick one and we can continue the conversation.

#### BobTPH

Joined Jun 5, 2013
8,655
Or perhaps you should just explain what you mean by "output characteristics". That might help.

Bob

#### crutschow

Joined Mar 14, 2008
34,002
The fundamental difference between an NPN and a PNP bipolar transistor is that, when in the active region, the collector and base of the NPN are more positive than the emitter, and for a PNP the collector and base are more negative than the emitter.
So identical circuits can be built with either, but the signal and bias polarities will be opposite.

#### pinkyponky

Joined Nov 28, 2019
351
Transistors have three basic configurations and they each perform different functions. The configurations are:
1. Common Emitter
2. Common Base
3. Common Collector
Pick one and we can continue the conversation.
Common emitter

#### DickCappels

Joined Aug 21, 2008
10,121
Post #9 completely answers your first question. Do you have other questions?

#### Bordodynov

Joined May 20, 2015
3,165
See